| Name/Model | Q15 |
| Hardware solution | DAC: AK4191EQ+AK4499EX USB: XMOS XU316 Bluetooth decoding: QCC5125 |
| Color | Black/ Titanium |
| Volume control | Volume knob |
| Weight | About 305g |
| Dimensions | About 143.5x71.75x21.75mm |
| MQA | Supports MQA Full Decoder |
| Driver-free mode (switch mode) | Supported |
| Gain | Ultra High (In Desktop mode, Power in port connected with QC power) /Super High/High/Medium/Low gain mode |
| Display | 1.30-inch TFT (240*240) bezel-less display |
| FiiO Control | Supports settings through app |
| Status display | On the display: Bluetooth codec, sampling rate, charging status, battery level, volume level, input source, gain level, power mode |
| Sampling rate display | Cyan: 44.1kHz/48kHz Yellow: 88.2/96/176/352.8/384/705.6/768kHz Green: DSD64/128/256/512 Purple: MQA |
| Bluetooth codec display | Blue: SBC Cyan: AAC Purple: aptX/aptX LL Yellow: aptX HD White: LDAC Green: aptX Adaptive |
| Channel balance | <0.2dB |
| Bluetooth reception (5.1) | AAC/SBC/aptX/aptX LL/ aptX Adaptive/aptX HD/LDAC |
| Coaxial decoding: Up to PCM 192kHz/24bit | XMOS/system firmware supports upgrade through USB |
| Recommended impedance | PO:8~150Ω BAL:8~350Ω |
| Buttons | Power button*1, Play/Pause*1, Previous track*1, Next track*1, Encoder knob (with confirm button) *1 |
| USB | Type-C USB2.0*2 Black USB (charging/data transfer), orange POWER IN (charging) |
| Headphone output | Standard 3.5mm port |
| BAL headphone output | Standard 4.4mm port |
| Line-out output | Standard 3.5mm port (shared PO) |
| BAL Line-out output | Standard 4.4mm port (shared 4.4mm BAL headphone out) |
| Digital coaxial input | RCA port |
| Toggle switch | PHONE MODE switch*1；DESKTOP MODE switch*1 |
| Power supply | Supports PD fast charging and ordinary charging |
| Battery capacity | 5500mAh lithium polymer battery |
| Gain level | Super High Gain mode |
| Playing track and format | MP3 44.1KHz/16bit |
